$($Weighted average cost of$$ capital$)$ The target capital structure for Jowers Manufacturing is $47$ percent common$$ stock, $17$ percent preferred$$ stock, and $36$ percent debt. If the cost of common equity for the firm is $20\mathrm{.}3$percent$,$ the cost of preferred stock is $11\mathrm{.}8$percent$,$ and the$$ before$-$tax cost of debt is $9\mathrm{.}9$percent$,$ what is$$ Jowers' cost of$$ capital? The$$ firm's tax rate is $34$ percent.